removerange

向量类别的removeRange()方法 (Vector Class removeRange() method)

• removeRange() method is available in java.util package.

  removeRange()方法在java.util包中可用。

• removeRange() method is used to remove all the elements lies in between starting index (st_index) and ending index (en_index) and st_index is inclusive whereas en_index is exclusive.

  removeRange()方法用于删除起始索引(st_index)和结束索引(en_index)之间的所有元素，st_index为包含值，而en_index为排除值。

• removeRange() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  removeRange()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• removeRange() method does not throw an exception at the time of removing elements in a range.

  removeRange()方法在删除范围中的元素时不会引发异常。

Syntax:

句法：

public void removeRange(int st_index , int en_index);

Parameter(s):

参数：

• int st_index – represents the starting endpoint to remove.

  int st_index –表示要删除的起始端点。

• int en_index – represents the ending endpoint to remove.

  int en_index –表示要删除的结束端点。

Return value:

返回值：

The return type of the method is void, it returns nothing.

该方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example // of void removeRange(int st_index , int en_index)// method of Vector import java.util.*;public class RemoveRangeAtOfVector {
    public static void main(String[] args) {
     // Instantiates a Vector object  with  // initial capacity of "10"  Vector < String > v = new Vector < String > (10);  // By using add() method is to add the  // elements in this v  v.add("C");  v.add("C++");  v.add("JAVA");  v.add("PHP");  v.add("SFDC");  v.add("ANDROID");  // Display Vector   System.out.println("v: " + v);  // By using removeRange(3,5) method is  // to remove the element in the given range  // and removing element starts at index 3   // and ends at index 5 but 5th index is exclusive  // its a protected method so we are using subList instead  v.subList(3, 5).clear();  // Display updated vector  System.out.println("v.removeRange(3,5): " + v); }}

Output

输出量

v: [C, C++, JAVA, PHP, SFDC, ANDROID]v.removeRange(3,5): [C, C++, JAVA, ANDROID]

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removerange